How to Log Request and Response Body with Retrofit-Android

How to log request and response body with Retrofit-Android?

I used setLogLevel(LogLevel.FULL).setLog(new AndroidLog("YOUR_LOG_TAG")), it helped me.

UPDATE.
You can also try for debug purpose use retrofit.client.Response as response model

Retrofit response body filed retun null, but logging interceptor showing full response in logact

I resolved this issue by adding kotlin model data class member filed default value. I don't know what is the reason behind this,

Old data class

data class BannerRes(
    @SerializedName("actionType")
    val actionType: Int?,
    @SerializedName("actionUrl")
    val actionUrl: String?,
    @SerializedName("activity")
    val activity: String?,
    @SerializedName("error")
    val error: Boolean?,
    @SerializedName("id")
    val id: String?,
    @SerializedName("imageUrl")
    val imageUrl: String?,
    @SerializedName("msg")
    val msg: String?,
    @SerializedName("visible")
    val visible: Boolean?
)

Modified or data class with member field default value which fix my problem

data class BannerRes(
    @SerializedName("error") var error : Boolean = true,
    @SerializedName("msg") var msg : String? = null,
    @SerializedName("id") var id : String? = null,
    @SerializedName("activity") var activity : String? = null,
    @SerializedName("imageUrl") var imageUrl : String? = null,
    @SerializedName("actionUrl") var actionUrl : String? = null,
    @SerializedName("actionType") var actionType : Int = 0,
    @SerializedName("visible") var visible : Boolean = false
    )

Logging with Retrofit 2

In Retrofit 2 you should use HttpLoggingInterceptor.

Add dependency to build.gradle. Latest version as of October 2019 is:

implementation 'com.squareup.okhttp3:logging-interceptor:4.2.1'

Create a Retrofit object like the following:

HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build();

Retrofit retrofit = new Retrofit.Builder()
        .baseUrl("https://backend.example.com")
        .client(client)
        .addConverterFactory(GsonConverterFactory.create())
        .build();

return retrofit.create(ApiClient.class);

In case of deprecation warnings, simply change setLevel to:

interceptor.level(HttpLoggingInterceptor.Level.BODY);

The above solution gives you logcat messages very similar to the old ones set by

setLogLevel(RestAdapter.LogLevel.FULL)

In case of java.lang.ClassNotFoundException:

Older Retrofit version might require an older logging-interceptor version. Take a look at comments sections for details.

Retrofit 2.x : Log Header for request and response

May it help someone ...

HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.HEADERS);
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

Add both to see complete logs and add this interceptor at the last (don't know why but its like this).

Getting Request body content using Retrofit 2.0 POST method

I have got it working from this link
Retrofit2: Modifying request body in OkHttp Interceptor

private String bodyToString(final RequestBody request) {
            try {
                final RequestBody copy = request;
                final Buffer buffer = new Buffer();
                if (copy != null)
                    copy.writeTo(buffer);
                else
                    return "";
                return buffer.readUtf8();
            } catch (final IOException e) {
                return "did not work";
            }
        }

Retrofit dependencies i am using are

 compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta3'
    compile 'com.squareup.okhttp3:okhttp:3.0.0-RC1'
    compile 'com.squareup.okhttp3:logging-interceptor:3.0.0-RC1'
    compile 'com.squareup.retrofit2:retrofit:2.0.0-beta3'

Retrofit2 Kotlin Response body gone to other file

well, little count of searching days, asking on this site and i get it. This is my solution, may be it can help to someone.
First of all i add OkHttpClient. It gave to me information about response. I saw, that my response is came to me normally, but i can't work with it. So, next work - create normally Responce file. Now i can do it on Kotlin, so i got it. My new files:

MainActivity :

@SuppressLint("SetJavaScriptEnabled")
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
...
    apiCall()

    }

    private fun getClient(): Retrofit? {

        val TEST_URL_API = "http://localhost:8080/api/"

        val interceptor = HttpLoggingInterceptor()
        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY)

        val client: OkHttpClient = OkHttpClient.Builder()
            .addInterceptor(interceptor)
            .retryOnConnectionFailure(true)
            .build()

        return Retrofit.Builder()
            .baseUrl(TEST_API_URL)
            .addConverterFactory(GsonConverterFactory.create())
            .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
            .client(client)
            .build()

    }

    private fun apiCall() {

        val call = getClient()!!.create(Api::class.java).createUser(
            DataModal()
        )

        call.enqueue(object : Callback<UserResponse>  {
            override fun onResponse(call: Call<UserResponse>, response: Response<UserResponse>) {

                val peremennayaResponsa = response.body()
                Log.i(TAG, "LOG AND RESULT: body = $peremennayaResponsa")
                Log.i(TAG, "headersы = ${response.headers()}")

            }

            override fun onFailure(call: Call<UserResponse>, t: Throwable) {
                Log.i(TAG, "Ошибка запроса = ${t.localizedMessage!!.toString()}")
                Toast.makeText(this@MainActivity, t.localizedMessage!!.toString(),
                    Toast.LENGTH_SHORT).show()
            }
        })
...

Api.kt :

interface Api {
    @Headers("Content-Type: application/json;charset=UTF-8")
    @POST("map")

    fun createUser(
        @Body dataModal: DataModal
    ) : Call<UserResponse>

And much more intrsting, UserResponse.kt:

data class UserResponse(

    val response: Any
    
)

Why it is intresting? So, my response habe raw body like {"error":null,"response":{"list":{"txtfiles":[{**info that i need** , and when i ask Application to do log in var i got an error like Expected a string but was BEGIN_OBJECT. But i solved it, given full response parameter Any, and now i will write my full response in .txt file, parse it and work with info that i needed.
Thank you for reading, and helping

Happy coding :)

How do I save and accumulate the request body data using Retrofit?

See examples like https://stackoverflow.com/a/38525843/1542667

which use MockWebServer just as a way to access RecordedRequest

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